Portland Harbour - Sandsfoot Castle (Beach) (Dorset) weather

Here are our top tips to keep you, your friends and family safe at the beach with links to Royal National Lifeboat Institution (RNLI) and Met Office advice.



Forecast days

Light showers changing to sunny intervals in the afternoon.
Beach safety today
Use caution in the sea. Waves can be bigger or stronger than you expect, strong rips likely, strong wind may blow you off course
  • • unsafe for novice surfers
  • • paddle boarding/kayaking not recommended at any level

Tide: Next high tide (2.8m) at

Sunrise iconSunrise:
Sunset iconSunset:
H UV
L Pollution

7 day forecast for Portland Harbour - Sandsfoot Castle (Beach)

Today (2 September 2025)
Time
13:00
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
Weather symbols Light shower day Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Partly cloudy night Partly cloudy night Cloudy Cloudy
Chance of precipitation
60%
10%
<5%
<5%
<5%
10%
10%
10%
10%
10%
40%
Temperature
18°
19°
19°
19°
18°
18°
18°
18°
17°
17°
17°
Feels like temperature (°C)
16°
16°
16°
16°
16°
16°
16°
15°
15°
15°
14°
Wind direction and speed
SSW
13
SSW
14
SW
15
SW
15
SW
16
SW
15
SW
15
WSW
14
WSW
14
WSW
15
WSW
16
Wind gust (mph)
25
27
25
27
26
25
23
25
25
26
27
Visibility
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
Humidity
87%
81%
76%
75%
76%
81%
84%
84%
84%
84%
84%
UV 6 5 3 2 1 1 1 - - - -
Wind direction and speed
13
14
15
15
16
15
15
14
14
15
16
Height of waves offshore (m)
0.5
0.6
0.6
0.5
0.5
0.5
0.4
0.4
0.4
0.3
0.3
Period of waves offshore (s)
5
6
6
6
6
6
6
6
6
6
5
Direction of waves offshore
Wednesday (3 September 2025)
Time
00:00
01:00
02:00
03:00
04:00
05:00
06:00
07:00
08:00
09:00
10:00
11:00
12:00
13:00
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
Weather symbols Light rain Heavy rain Heavy rain Light rain Light rain Light rain Heavy rain Heavy rain Heavy rain Heavy shower day Light shower day Light shower day Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night
Chance of precipitation
80%
≥95%
90%
80%
70%
70%
90%
90%
90%
70%
70%
60%
30%
20%
20%
20%
20%
10%
10%
10%
10%
10%
20%
40%
Temperature (°C)
17°
17°
17°
17°
18°
18°
18°
18°
18°
18°
18°
18°
18°
19°
19°
19°
19°
18°
18°
17°
17°
17°
17°
17°
Feels like temperature (°C)
14°
14°
13°
13°
13°
13°
12°
12°
13°
13°
13°
13°
14°
14°
13°
14°
13°
13°
13°
13°
13°
13°
13°
13°
Wind direction and speed (mph)
SW
16
SSW
17
S
20
SSW
25
SSW
28
SSW
29
SSW
29
SSW
28
SW
26
SW
25
SW
25
SW
24
SW
24
SW
25
SW
25
SW
24
WSW
24
WSW
24
WSW
23
WSW
23
WSW
22
WSW
20
SW
19
SW
19
Wind gust (mph)
29
32
38
45
45
46
48
48
45
43
43
42
42
42
42
41
40
38
37
35
34
32
32
32
Visibility (description)
E
VG
M
M
M
G
G
M
G
VG
E
E
E
E
E
E
E
E
E
E
VG
VG
VG
VG
Humidity
84%
87%
92%
92%
92%
91%
91%
92%
91%
91%
91%
87%
84%
76%
73%
72%
70%
69%
72%
72%
73%
73%
74%
75%
UV - - - - - - 1 1 1 1 2 4 6 6 5 4 3 1 1 1 - - - -
Wind direction and speed (mph)
16
17
20
25
28
29
29
28
26
25
25
24
24
25
25
24
24
24
23
23
22
20
19
19
Height of waves offshore (m)
0.2
0.2
0.3
0.5
0.6
0.6
0.6
0.6
0.7
0.8
0.8
0.7
0.7
0.6
0.6
0.5
0.5
0.4
0.4
0.4
0.4
0.3
0.3
0.3
Period of waves offshore (s)
5
5
2
3
3
3
3
3
3
6
6
6
6
6
6
6
6
6
6
6
6
2
2
2
Direction of waves offshore
Thursday (4 September 2025)
Time
00:00
01:00
04:00
07:00
10:00
13:00
16:00
19:00
22:00
Weather symbols Light shower night Heavy shower night Light shower night Sunny intervals Sunny intervals Light shower day Light shower day Partly cloudy night Clear night
Chance of precipitation
60%
80%
70%
30%
40%
60%
50%
40%
20%
Temperature (°C)
16°
16°
15°
15°
17°
18°
18°
17°
15°
Feels like temperature (°C)
13°
13°
12°
12°
14°
15°
15°
14°
13°
Wind direction and speed (mph)
SW
18
SW
18
SW
18
WSW
17
WSW
16
WSW
16
WSW
16
WSW
15
W
12
Wind gust (mph)
33
34
33
29
29
30
30
26
23
Visibility (description)
VG
VG
E
E
E
E
E
E
VG
Humidity
75%
76%
78%
78%
67%
64%
65%
72%
76%
UV - - - 1 4 6 3 1 -
Wind direction and speed (mph)
18
18
18
17
16
16
16
15
12
Height of waves offshore (m)
0.3
0.3
0.4
0.3
0.3
0.3
0.2
0.1
1.3
Period of waves offshore (s)
2
2
2
6
5
5
2
13
11
Direction of waves offshore
Friday (5 September 2025)
Time
01:00
04:00
07:00
10:00
13:00
16:00
19:00
22:00
Weather symbols Clear night Clear night Sunny day Sunny intervals Sunny day Sunny day Clear night Clear night
Chance of precipitation
10%
10%
10%
10%
10%
<5%
<5%
<5%
Temperature (°C)
15°
15°
14°
17°
18°
18°
17°
15°
Feels like temperature (°C)
13°
13°
13°
15°
16°
16°
16°
15°
Wind direction and speed (mph)
W
12
W
11
W
9
W
11
WSW
11
SW
11
SW
9
SSW
5
Wind gust (mph)
21
20
17
18
20
20
14
10
Visibility (description)
VG
VG
VG
VG
VG
VG
VG
VG
Humidity
78%
79%
82%
65%
57%
62%
70%
79%
UV - - 1 4 6 3 1 -
Wind direction and speed (mph)
12
11
9
11
11
11
9
5
Height of waves offshore (m)
1.2
1.0
0.9
0.7
0.6
0.6
0.5
0.5
Period of waves offshore (s)
10
10
10
9
9
9
9
8
Direction of waves offshore
Saturday (6 September 2025)
Time
01:00
04:00
07:00
10:00
13:00
16:00
19:00
22:00
Weather symbols Partly cloudy night Partly cloudy night Sunny intervals Sunny day Sunny day Sunny intervals Partly cloudy night Partly cloudy night
Chance of precipitation
<5%
<5%
<5%
<5%
<5%
<5%
<5%
10%
Temperature (°C)
15°
15°
15°
18°
19°
19°
19°
18°
Feels like temperature (°C)
15°
15°
14°
16°
16°
16°
16°
16°
Wind direction and speed (mph)
SSE
5
SE
6
SE
8
SE
13
SE
14
ESE
14
ESE
13
ESE
12
Wind gust (mph)
12
15
20
22
22
22
21
21
Visibility (description)
G
G
G
VG
VG
VG
VG
VG
Humidity
83%
83%
84%
71%
66%
67%
73%
76%
UV - - 1 3 5 2 1 -
Wind direction and speed (mph)
5
6
8
13
14
14
13
12
Height of waves offshore (m)
0.4
0.5
0.5
0.5
0.5
0.5
0.5
0.6
Period of waves offshore (s)
8
8
8
7
8
4
4
4
Direction of waves offshore
Sunday (7 September 2025)
Time
01:00
04:00
07:00
10:00
13:00
16:00
19:00
22:00
Weather symbols Partly cloudy night Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Partly cloudy night
Chance of precipitation
20%
30%
40%
40%
40%
40%
30%
20%
Temperature (°C)
18°
17°
17°
19°
20°
19°
18°
16°
Feels like temperature (°C)
16°
16°
15°
17°
18°
17°
16°
15°
Wind direction and speed (mph)
SE
11
SE
11
SSE
11
S
13
SE
13
S
14
S
12
SW
9
Wind gust (mph)
22
20
21
24
24
22
15
12
Visibility (description)
VG
VG
G
G
G
G
G
G
Humidity
82%
87%
92%
89%
84%
84%
87%
90%
UV - - 1 2 4 1 1 -
Wind direction and speed (mph)
11
11
11
13
13
14
12
9
Height of waves offshore (m)
0.6
0.6
0.8
0.9
1.2
1.6
2.2
2.0
Period of waves offshore (s)
5
5
4
5
5
6
7
10
Direction of waves offshore
Monday (8 September 2025)
Time
01:00
04:00
07:00
10:00
13:00
16:00
19:00
22:00
Weather symbols Partly cloudy night Partly cloudy night Sunny intervals Light shower day Sunny intervals Sunny intervals Partly cloudy night Partly cloudy night
Chance of precipitation
20%
20%
30%
50%
50%
30%
20%
30%
Temperature (°C)
16°
15°
14°
17°
18°
17°
16°
15°
Feels like temperature (°C)
15°
14°
13°
15°
15°
15°
14°
13°
Wind direction and speed (mph)
WSW
8
WSW
9
SW
10
SW
13
SW
16
SW
15
WSW
12
WSW
9
Wind gust (mph)
12
13
17
23
24
21
14
13
Visibility (description)
G
G
G
G
G
VG
VG
VG
Humidity
93%
91%
92%
83%
73%
74%
77%
87%
UV - - 1 3 5 2 1 -
Wind direction and speed (mph)
8
Height of waves offshore (m)
Period of waves offshore (s)
Direction of waves offshore

Tide times

Tuesday 2 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Tuesday 2 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Tuesday 2 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Tuesday 2 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Wednesday 3 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Wednesday 3 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Wednesday 3 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Wednesday 3 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Thursday 4 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Thursday 4 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Thursday 4 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Thursday 4 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Friday 5 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Friday 5 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Friday 5 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Friday 5 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Saturday 6 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Saturday 6 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Saturday 6 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Saturday 6 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Sunday 7 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Sunday 7 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Sunday 7 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Sunday 7 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Monday 8 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Monday 8 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Monday 8 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Monday 8 September

Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Portland Harbour - Sandsfoot Castle (Beach) weather map

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South West England weather forecast

Headline:

Remaining unsettled with further scattered, blustery showers.

Today:

Widespread cloud and rain will spread eastwards through the morning, with heavy downpours at times. Turning brighter from the west into the afternoon, although occasional showers are still possible. Breezy, especially along the south coast. Maximum temperature 21 °C.

Tonight:

Settled for many this evening with a few clear spells, before becoming overcast tonight as a band of rain moves in from the southwest. Some heavy downpours and becoming breezier. Minimum temperature 12 °C.

Wednesday:

Widely wet and windy through the morning, with heavy, sometimes thundery spells at times. Brighter skies developing by the afternoon bringing a mixture of sunshine and blustery showers. Maximum temperature 20 °C.

Outlook for Thursday to Saturday:

Scattered, blustery showers for many on Thursday, but some brighter spells too. More settled from Friday; mainly dry with some sunshine, though still rather breezy at times.

Updated:

UK long range weather forecast

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